Air-operated clamping device.



M. R. HANSEN & A. C. HOUSER.

AIR OPERATED CLAMPING DEVICE.

APPLICATION FILED APR- I3. I918. 1,274,036. Patented July 30,1918.

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M. R. HANSEN & A. C. HOUSER. AIR OPERATED CLAMPING DEVICE.

APPLICATION FILED APR- 13. I918- 1- ,274,03 6 Patented July 30,1918.

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To all whom it mag/ concern:

Belt known that we, MnRRrr'r HANSEN and ALF-RED C. HOUSER, citizens of. the; United States, and residents of-Columbus, in the county of Franklin and Stateof Ohio, have invented certain new and useful Improvements in Air-Operated Clamping Devices; and we do hereby declare the following tojbe a full, clear, and'exact description of the invention, such as will enable others skilled in the art to which it.

appertains: to make and use the same.

This invention relates to air Operated clamping devices designed more particularly foruse' with molding apparatus. i

a machine; of theabove type witha clamping device by which the ''machine roperator through" manipulating a -conveniently lovide a construction of clamps by which'the" parts at all times are under the operators control and so arranged that they will be clear to all other working parts of the machine.

With the above and other objects in view, our invention consists in the parts and combination of parts which will be more fully pointed out and described in the claims.

While we have shown the application of our invention to one form of molding ma-.

chine, we have done so for the purpose of illustration only, and not with the intention of limiting our invention to such, or any other particular constructionof molding machine.

In the accompanying drawings; Figure 1 is a view in side elevation showing our improved clamp applied to a roll over type of molding apparatus; Fig. 2 is a similar view, showing the carrier after it has been turned to its other position; Fig. 3 is a view of the clamp; Fig. 3 is a view in plan of the clamp; Fig. 4 is a view similarto Fig. 1 showing a modified form of clamp and Fig. 5 is a detached view of a part of the clamp.

Referring to the accompanying drawings,

'Theobject of our invention is to provide -rier.12. i 1

. The lever. 9 constitutestheclamp, preferably in the form'of a: bell crank, with:

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Application filed April-13,1918; 'Seria1No.228,403. 1

its. fulcrum on the swinging link 10,.at the. V

angles of the two arms. One arm of: the bell crank is pivotally connectedlto the outer free end ofthe piston :rod 8, and 'the-otheriarm" terminates; in the-bifurcated: or: U-shaped member 16 which constitutes the clamp; proper. 7:

V .In theoperation after.

ming upithe corebox,-the-core=.plate 13 is deposited on top of same.

. By means of the four-way' valve -=6, oom

pressed air is admitted on the lower side ofthe piston at 6, and simultaneously exhausted through the upper outlet of the cylinder. Hence the piston rod 8 will move instantly upward, thereby actuating the clamping lever 9 which operates to firmly clamp the core plate 13 against the top of the core box 11. v

By manipulating the roll over arm or car- I rier 12 in the usual manner the core box and the cylinder will be transferred and in verted to the position shown in Fig. 2, and by thus reversing the four-way valve 6, air

will be admitted at 6 and exhausted through the pipe 6 at the upper side of the cylinder,

thus forcing the piston rod 8 upwardly and causing the lever 9 to withdraw. to the position shown in Fig. 2, leaving a clear space ,7 below for the subsequent removal of the core plate 13. I p

' In Figs. 4 and 5 we have shown a modified form of clamping lever, whereby the piston rod 8 is provided with a hook 8 embrac-l ing an extended lever arm 15, which latter is fulcrumed at its other extremity to a bracket 17 secured to the roll over arms. With this construction when the air pressure is applied to the upper side of the piston 14 the core plate will be firmly clamped against the core box, and when the pressure is'transferred to the other side of the piston,

the lever arm 15 will be released.

It is evident that many slight variations might be resorted to in the relative arrangement of parts shown without departing from the spirit and scope of our invention, hence we would have it understood that we do not wish to confine ourselves to the exact construction and arrangement of parts shown and described.

Having fiully described our invention what we claim as new and desire to secure by Letters-Patent, is-:

1. In molding apparatus, the combination of a turn over support for a core box or flask, a cylinder movable with said support and; having a piston, a, clamp actuated by the. piston for clamping a plate or board to the box or flask, pipe connections with the cylinder atboth sides of the piston and a valve for regulating the admission and exhaust of pressure medium to the cylinder.

2'. In molding apparatus, the combination of a turn over support for a core box or flask, a cylinder carried by said support, pipe connections with the opposite ends of said cylinder, a fourway valve for regulatingthesupply and discharge to said cylinder, a piston and piston rod, a clamp having pivotal connection with the piston rod and a rocking support for the clamp.

3'. In molding apparatus, the combination of a turn over support, a cylinder secured ends of the cylinder, a four way valve includedin said pipe connections, a swinging link having its pivot fixed with relation to,

the cylinder, and a clamp having pivotal coinieetion with the piston rod and also with the. swinging link.

6. The combination of a cylinder, a piston and piston rod, pipes for supplying PIGSSHIQ'IHBCHUJH to and fior exhausting it iirom said cylinder, a four way valve included in said: pipe connection, a swinging link pivoted to a lug on the cylinder and a clamp having pivotal connection with. said link and also with the piston rod.

In testimony whereof, we have signed this specification in the presence oifi two suloscribrv ing witnesses.

' MERRITT R. HANSEN.

ALFRED HOUSER. Witnesses: STANLEY J. PHRUNGHER, WILLIAM H. NORTON.

Golgi", of thll. Patent may.- be; obtained {or five cents each, by addressing the Commissioner 01 Iatentl, Wilmington, ID. 0 

